Final answer:
Seven hundred fifty milliliters is correctly abbreviated as '750 mL', following metric notation rules where 'mL' stands for milliliters, with the numeral indicating the quantity.
Step-by-step explanation:
The question asks to abbreviate seven hundred fifty milliliters using correct metric notations. One liter is equivalent to one thousand milliliters, which can be used to convert liter measurements to milliliters and vice versa. When abbreviating measurements in the metric system, it's important to use proper formatting for clarity and accuracy.
In this case, 'seven hundred fifty' translates numerically to 750. Since we are dealing with milliliters, the correct abbreviation uses 'mL', which stands for milliliters. Therefore, the abbreviation for seven hundred fifty milliliters is 750 mL, which corresponds to option (a) among the provided choices.